High-voltage electric field low-temperature plasma cold sterilization device

Abstract

The invention discloses a high-voltage electric field low-temperature plasma cold sterilization device, and belongs to the technical field of frequency converter power supply circuits. According to the high-voltage electric field low-temperature plasma cold sterilization device, a frequency converter, a first-stage inductor, an electric voltage regulator, an alternating-current contactor and a solid-state relay are arranged on the front portion in a shell, a transformer is arranged on the rear portion of the shell, the transformer with a large size is arranged on the inner side of the shell, and the frequency converter, the first-stage inductor, the electric voltage regulator, a second-stage inductor, the alternating current contactor and the solid-state relay which are small in size are located on the outer side of the shell, so that mounting and dismounting are convenient, and the working conditions of all structures can be observed conveniently. The frequency converter is externallyconnected with the first-stage inductor, so that the output voltage is controllable, harmonic components in modulation waves are suppressed, the frequency spectrum is expanded, and the harmonic current entering a voltage regulation module is stable.

Description

technical field [0001] The invention relates to the technical field of frequency converter power circuits, and more specifically relates to a high-voltage electric field low-temperature plasma cold sterilization device. Background technique [0002] Plasma is the fourth state of matter. It consists of an ionized conductive gas, which includes six typical particles, namely electrons, positive ions, negative ions, atoms or molecules in an excited state, atoms or molecules in a ground state, and photons. [0003] The ions, electrons, excited atoms, molecules and free radicals enriched in the low-temperature plasma space are all active particles, which are easy to react with the material surface. Therefore, it is widely used in sterilization, surface modification, thin film deposition, etching processing, device cleaning and other fields. [0004] High-voltage electric field low-temperature plasma cold sterilization is a new type of food cold sterilization technology in the wo...

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Problems solved by technology

[0012] The purpose of the present invention is to overcome the shortcomings of the prior art that the frequency converter can only carry inductive loads but cannot drive capacitive loads, and provides a high-voltage electric field low-temperature plasma cold sterilization device. The larger transformer is arranged at the rear of the shell The small single-phase inverter, the first-stage inductance, the electric voltage regulator, the second-stage inductance, the AC contactor and the solid-state relay are located in the front of the shell, which is convenient for installation and disassembly, and is also convenient for observing the work of each structure Situation: The frequency converter is externally connected with the first-stage inductance, so that the clutter of the power supply and high-frequency high-order harmonics are effectively filtered out, which solves the problem that the frequency converter and the voltage regulator are directly connected to the load, causing the frequency converter and the voltage regulation module to be burned. At the same time, the high-order harmonics fed back during the drive plasma discharge process can also be filtered out to ensure the stable operation of the overall circuit; the second-stage inductor is connected after the voltage regulator, which solves the problem of avoiding the circuit when the voltage regulation changes. Due to the negative resistance effect generated during the plasma discharge process, the output voltage is more stable, and the system can run reliably for a long time

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